Four-way valve.



D. JHFVANS.

FOUR WAY VALVE.

APPLICATION rufo MAY xo. |915.

1,1 90,992. v l .Patented July 11, 1916.

3 v vue-Mofa D. J. Evans.

DAVID J'. EVANS, OF SHARON, PENNSYLVANIA.

. FOUR-WAY VALVE.

Specification of Letters Patent.

Patienten .nay ai, raie.

Application led May 10, 1915. Serial No.`27,132;

' ing to be a full, clear, and exact description of the invention, such as will enable others skilled.Y in the art to which it appertains to make and use the same.

This invention relates to four-way valves adapted for supplying motive fluld to the opposite ends of the cylinder, and one of' the principal objects of the invention is to provide a valve of comparatively simple construction, in which the stroke of the valve lever is short, and in which means are provided for taking up the wear of the valve in the valve casing automatically.

' The foregoing and other objects may be attained by means of the construction illustrated in the accompanying drawing, in which- Figure 1 is a top plan view of a fourway valve made'in accordance with this invention, F ig. 2 is a vertical sectional view taken on the line 2 2 of Fig. 1, Fig. 3 is a sectional view taken on the line 3-3 of 1* ig. 2, and Fig. 4 is a detail perspective view of the valve head and stem, the latter being broken away. y

Referring to the drawings by reference numerals, 1 designates the casing of my improved valve.

The casing 1 is fully open at its upper end, and closed at its lower end, and the side wall of the valve chamber thereof is formed to provide a tapered valve seat 2. An' inlet port 3 and outlet ports 4 and 5 communicate with the valve chamber at a point betweenthe upper and lower ends thereof, the inlet port being located at one side and the outlet ports at the oppositev sides of the casing 1. rlhe outlet ports 4 and 5 are approximately 900 apart and an exhaust port which is located between the inlet port 3 and the outlet port 5 communi- Cates with the valve chamber at a point between the outlet ports 4 and 5 through a bypass 12.

A frusto-'conical valve plug 7 is mounted 'in the valve chamber, the valve plug 7 being provided with a circumferential groove 8 which is located between the ends thereof,

and which extends more than halfway around the same. A second circumferential groove 11 is formed in the valve plug 7 intermediate the ends of and shorter than the v groove 8, relatively narrow Walls 9 and 10 being thus left separating the ends of the grooves.` The valve 7 is providedwith a stem 13 which extends through a removable cap 14, which cap is securedto the open end of the valve casing 1 by lag screws 15. The cap 14 is provided with an-upstanding neck 14 which has an interiorly arranged flange 15 which flange is located centrally of the ends of the neck. A' suitable packing 16 is placed in the neck 14 upon the upper face of the flange l5', which packing surrounds the valve-stem 13, and prevents leakage at that point, and an adjusting collar 17 is fitted in the upper end of the neck 14 holding said packing in place. A coil spring 18 surrounds the valve stem and bears at one end against the valve head, While the opposite end bears against the under face of the flange in the neck 14. The

- valve plug and seat are s proportioned that .a space 19 is left below said plug to which the valve is urged by a spring 18 as wear of the coperatng parts takes place to always insure the proper seating of the valve. Connected to the upper end of the valve stem l13 is a lever 20, which lever is held connected therewith by means of a nut 22.

From the foregoing it will be obvious that the movement of the lever21 will be of a very lshort throwto operate the valve head in the` casing.` rlhe liquid passes in through the port 3 into the groove 8, and

out through the port 4 into the cylinder, while liquid from the other end of the cylinder will return through the port 5, into the passage way 11 and the by-pass 12 and out through the exhaust port 6. l/Vhen the valve is shifted to'bring passage 8 in register with the port 5, the liquid will pass through the port 3, land out through the port 5, while the port 4 will then register with the passage 11 and the exhaust 6.

` From the foregoing it will be obvious that a fourway valve made in accordance with this invention will require but slight movement of the operating lever to move the same, and will also take up wear of the valve head and valve seat, and it can be readily taken apart and assembled for use.

Various changes may be made in the details of construction without departing from the spirit and -scope of the invention as defined in the claim.

l/Vhat is claimed is z- A four-way valve comprising a valve casing having a tapering seat therein, a removable cap inclosing said casing, an inlet port insaid casing leading to the valve seat, a pairI of discharge ports in said casing leading to said valve seat, located approximately 90o apart and situated in the opposite side of the valve casing from the inlet port, an exhaust port for said-valve seat located between the discharge ports and communicating with a by-pass leading through the casing and terminating at a point between the inlet port and one of the discharge ports, a frusto-conical valve plug in said casing co-v operating with said seat, said valve having nieaeea a stem extending through Said removable 2a cap and surrounded by a helical spring, said valve having a circumferential groove intermediate its ends extending more than half-way therearound and a second circumferential groove intermediate the ends of 2t the first groove and shorter than said rst groove,. the valve plug and seat being so proportioned that a space is left below said plug into which the Valve is urged by the spring as wear of the coperating parts 3o takes place so as to always insure theproper seating of the valve. 

